diff --git a/administrator/components/com_joomlaupdate/extract.php b/administrator/components/com_joomlaupdate/extract.php
index 57dd84ef4d8c8..8a7180b33e01e 100644
--- a/administrator/components/com_joomlaupdate/extract.php
+++ b/administrator/components/com_joomlaupdate/extract.php
@@ -1956,7 +1956,7 @@ function setHugeMemoryLimit()
             @unlink($basePath . 'update.php');
 
             // Import a custom finalisation file
-            $filename = \dirname(__FILE__) . '/finalisation.php';
+            $filename = __DIR__ . '/finalisation.php';
 
             if (file_exists($filename)) {
                 clearFileInOPCache($filename);
diff --git a/administrator/index.php b/administrator/index.php
index c47e4bb494d0a..480d1fce34f93 100644
--- a/administrator/index.php
+++ b/administrator/index.php
@@ -29,4 +29,4 @@
 \define('_JEXEC', 1);
 
 // Run the application - All executable code should be triggered through this file
-require_once \dirname(__FILE__) . '/includes/app.php';
+require_once __DIR__ . '/includes/app.php';
diff --git a/api/index.php b/api/index.php
index 3785e00f2cf5c..39b7bd8adceda 100644
--- a/api/index.php
+++ b/api/index.php
@@ -28,4 +28,4 @@
 \define('_JEXEC', 1);
 
 // Run the application - All executable code should be triggered through this file
-require_once \dirname(__FILE__) . '/includes/app.php';
+require_once __DIR__ . '/includes/app.php';
diff --git a/index.php b/index.php
index 85daa024dce05..0ce8bceb9aef4 100644
--- a/index.php
+++ b/index.php
@@ -29,4 +29,4 @@
 define('_JEXEC', 1);
 
 // Run the application - All executable code should be triggered through this file
-require_once dirname(__FILE__) . '/includes/app.php';
+require_once __DIR__ . '/includes/app.php';
diff --git a/installation/index.php b/installation/index.php
index 163297bc31829..099e5daf1d835 100644
--- a/installation/index.php
+++ b/installation/index.php
@@ -29,4 +29,4 @@
 \define('_JEXEC', 1);
 
 // Run the application - All executable code should be triggered through this file
-require_once \dirname(__FILE__) . '/includes/app.php';
+require_once __DIR__ . '/includes/app.php';
diff --git a/installation/joomla.php b/installation/joomla.php
index 137e042651c57..6a3e8db46c2a6 100644
--- a/installation/joomla.php
+++ b/installation/joomla.php
@@ -36,4 +36,4 @@
 \define('_JCLI_INSTALLATION', 1);
 
 // Run the application - All executable code should be triggered through this file
-require_once \dirname(__FILE__) . '/includes/cli.php';
+require_once __DIR__ . '/includes/cli.php';